One of the remarkable features of air-raid damage the frequency with which important structures and buildings escape damage not only when the attacks have been made at night but also in the daytime, says the "Manchester Guardian." The fact that vital targets have not been hit, must be simply a matter of chance, of course, in some instances, but there are cases where their immunity is undoubtedly the result of clever camouflage. The concealment of objects on the ground from air observation is a defence problem of major importance entailing the most careful study and skilful application of special systems developed through prolonged research work by engineers, physicists, and photographers.
When an important site is to bels camouflaged an expert flies over it at different heights and from ya ious directions and photographs are taken of it. From these photographs a scale model is constructed, and a camouflage scheme is worked out and applied to it. The model is afterwards inspected under varying light conditions and different distances in order gauge the effectiveness of to e general arrangement, If necessary alterations are made.
Then, when the desired results have been obtained, a colour photograph is taken of it, the complete plan is drawn to scale, and the whole scheme is applied to the actual site-Finally, an aircraft is used to make a complete inspection when the camouflage work has been carried out, and further photographs are taken in case alterations are required. Camouflage and dazzle painting were introduced in the last war, and nets were used behind guns, transport, and ammunition dumps.
Such means of concealment are being resorted to by the enemy in this war but of course there has been a marked development in the methods used. Reports have been made that at places in Holland and Belgium the Luftwaffe is using dummy aircraft on the ground to mislead our bombers, This, too, was a plan evolved in the last war and was first used by the French. In the lence of camouflage Germany is in no way ahead of Britain, A special section of the Research and Experiments Department of the Ministry of Home Security is constantly working 1 the problems a Will members of the Needlecraft Section please note that the meetings ior the remainder- of February are as follows:—
Mondays. February 17. at Mrs, Toegs' 753 Vu Vu Yuen Road, Fiat T-A.
4 v, February 24. at Headquarters, Bund, At the Home and Garden Section's nual meeting on February 7. Mrs.
Lester Arnold was elected to be the new Chairman of the Section.
Two sub-committees were formed one to handle the making ofj marmalade, jams and pickles under chairmanship of Mrs. G.
barton, and another to collect ud sell lettuce and fresh vegetables ith Mrs. A. V. T. Dean in char Every Wednesday morning. at Headquarters, there will be sales of the section's home-made salads and vegetables. produce and which will perfectly safe to use
Text read from the printed page and cleaned; old type leaves the occasional error.